Disk device with shape identifier

Abstract

A disk device is capable of quickly identifying an inserted optical disk. A reading portion obtains disk surface information from an optical disk that is passing, and stores the obtained disk surface information in a storing portion provided in a disk playing device. An identifying portion decides whether or not the disk playing device is able to play the optical disk, based on the surface information.

The invention claimed is: 
     
       1. A disk device, comprising:
 a disk carrying unit that carries an inserted optical disk to a predetermined position; 
 a disk reading unit that obtains optical information of at least any one of a data surface and a non-data surface of the optical disk; 
 a shape identifying unit which senses a radial protrusion in an outer peripheral edge of the optical disk using the optical information read by the disk reading unit; and 
 a play deciding unit that decides whether or not the optical disk is playable, based on whether the radial protrusion in the outer peripheral edge of the optical disk crosses a predetermined boundary in the radial direction, the play deciding unit deciding the optical disk is not playable when the radial protrusion in the outer peripheral edge of the optical disk crosses the predetermined boundary, 
 wherein the disk reading unit obtains the optical information in a state that the optical disk is being carried by the disk carrying unit. 
 
     
     
       2. The disk device according to  claim 1 , wherein, when a decision result by the play deciding unit indicates that the optical disk is unplayable, the disk carrying unit carries the optical disk in a direction to eject the optical disk. 
     
     
       3. The disk device according to  claim 1 , further comprising:
 an informing unit that informs that the optical disk is unplayable when the decision result by the play deciding unit indicates that the optical disk is unplayable. 
 
     
     
       4. The disk device according to  claim 1 , further comprising:
 a data surface identifying unit that identifies whether a surface of the optical disk read by the disk reading unit corresponds to a data surface on which data are recorded or a non-data surface on which data are not recorded, based on the read information. 
 
     
     
       5. The disk device according to  claim 4 , wherein the play deciding unit decides that the optical disk is unplayable when the data surface identified by the data surface identifying unit is not directed in a predetermined direction, and the disk carrying unit carries the optical disk in a direction to eject the optical disk when it is decided by the play deciding unit that the optical disk is unplayable.